WO2002037832A3 - Systeme et procede d'amelioration d'images de documents scannes pour impression en couleurs - Google Patents
Systeme et procede d'amelioration d'images de documents scannes pour impression en couleurs Download PDFInfo
- Publication number
- WO2002037832A3 WO2002037832A3 PCT/US2001/045426 US0145426W WO0237832A3 WO 2002037832 A3 WO2002037832 A3 WO 2002037832A3 US 0145426 W US0145426 W US 0145426W WO 0237832 A3 WO0237832 A3 WO 0237832A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- scanned document
- edges
- document images
- color printing
- estimated background
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
- H04N1/56—Processing of colour picture signals
- H04N1/58—Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/409—Edge or detail enhancement; Noise or error suppression
- H04N1/4095—Correction of errors due to scanning a two-sided document, i.e. show-through correction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Image Processing (AREA)
Abstract
L'invention concerne un système et un procédé permettant d'améliorer des images de documents scannés au moyen d'une luminance de fond (118) estimée d'une image numérique donnée de sorte à éliminer ou à réduire (720) le bruit optique « en transparence ». La luminance de fond estimée dépend des valeurs de luminance des pixels des bords de texte détectés de l'image. Dans un mode de réalisation, la luminance de fond estimée est créée uniquement au moyen des pixels de bords qui se trouvent sur le côté le plus clair des bords détectés. En plus d'éliminer la transparence, ce système et ce procédé peuvent également améliorer les images de documents scannés en éliminant (714) les franges de couleur et en accentuant et/ou fonçant (712) les bords du texte contenu dans les images.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002540441A JP4112362B2 (ja) | 2000-11-01 | 2001-10-31 | カラー印刷用のスキャンした文書イメージを強調するシステム及び方法 |
AU2002227115A AU2002227115A1 (en) | 2000-11-01 | 2001-10-31 | System and method for enhancing scanned document images for color printing |
DE60137704T DE60137704D1 (de) | 2000-11-01 | 2001-10-31 | System und verfahren zur verbesserung von gescannten dokumentbildern für den farbdruck |
EP01993115A EP1330917B1 (fr) | 2000-11-01 | 2001-10-31 | Systeme et procede d'amelioration d'images de documents scannes pour impression en couleurs |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/704,358 US6621595B1 (en) | 2000-11-01 | 2000-11-01 | System and method for enhancing scanned document images for color printing |
US09/704,358 | 2000-11-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002037832A2 WO2002037832A2 (fr) | 2002-05-10 |
WO2002037832A3 true WO2002037832A3 (fr) | 2002-08-29 |
Family
ID=24829138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/045426 WO2002037832A2 (fr) | 2000-11-01 | 2001-10-31 | Systeme et procede d'amelioration d'images de documents scannes pour impression en couleurs |
Country Status (6)
Country | Link |
---|---|
US (1) | US6621595B1 (fr) |
EP (1) | EP1330917B1 (fr) |
JP (1) | JP4112362B2 (fr) |
AU (1) | AU2002227115A1 (fr) |
DE (1) | DE60137704D1 (fr) |
WO (1) | WO2002037832A2 (fr) |
Families Citing this family (64)
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US7228002B2 (en) * | 2001-05-14 | 2007-06-05 | Intel Corporation | Inverse halftoning process |
US7058222B2 (en) * | 2001-12-20 | 2006-06-06 | Xerox Corporation | Automatic background detection of scanned documents |
US7050650B2 (en) * | 2002-02-28 | 2006-05-23 | Hewlett-Packard Development Company, L.P. | User selected background noise removal for scanned document images |
JP3855805B2 (ja) * | 2002-03-07 | 2006-12-13 | ブラザー工業株式会社 | 画像処理装置および画像処理方法 |
JP3862613B2 (ja) | 2002-06-05 | 2006-12-27 | キヤノン株式会社 | 画像処理装置及び画像処理方法並びにコンピュータプログラム |
JP3862621B2 (ja) * | 2002-06-28 | 2006-12-27 | キヤノン株式会社 | 画像処理装置、画像処理方法、及びそのプログラム |
JP3964297B2 (ja) * | 2002-09-19 | 2007-08-22 | 株式会社リコー | 画像処理装置、画像処理方法、およびコンピュータが実行するためのプログラム |
NL1022258C2 (nl) * | 2002-12-24 | 2004-06-25 | Univ Delft Tech | Werkwijze voor het bewerken van een kleurenbeeld. |
US7194142B2 (en) * | 2003-02-28 | 2007-03-20 | Hewlett-Packard Development Company, L.P. | Selective thickening of dark features by biased sharpening filters |
JP3823933B2 (ja) * | 2003-03-07 | 2006-09-20 | コニカミノルタビジネステクノロジーズ株式会社 | 画像処理装置 |
US20050001872A1 (en) * | 2003-07-02 | 2005-01-06 | Ahne Adam Jude | Method for filtering objects to be separated from a media |
JP2005045404A (ja) * | 2003-07-24 | 2005-02-17 | Ricoh Co Ltd | 画像処理装置、画像処理方法およびプログラム |
US7433535B2 (en) | 2003-09-30 | 2008-10-07 | Hewlett-Packard Development Company, L.P. | Enhancing text-like edges in digital images |
FR2869749B1 (fr) * | 2004-04-30 | 2006-10-20 | Sagem | Procede et systeme de traitement d'image par filtrage de blocs de pixels de l'image |
US7428331B2 (en) * | 2004-11-30 | 2008-09-23 | Seiko Epson Corporation | Page background estimation using color, texture and edge features |
US9137417B2 (en) | 2005-03-24 | 2015-09-15 | Kofax, Inc. | Systems and methods for processing video data |
US9769354B2 (en) | 2005-03-24 | 2017-09-19 | Kofax, Inc. | Systems and methods of processing scanned data |
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US20060245665A1 (en) * | 2005-04-29 | 2006-11-02 | Je-Ho Lee | Method to detect previous sharpening of an image to preclude oversharpening |
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US7783117B2 (en) * | 2005-08-12 | 2010-08-24 | Seiko Epson Corporation | Systems and methods for generating background and foreground images for document compression |
US7899258B2 (en) * | 2005-08-12 | 2011-03-01 | Seiko Epson Corporation | Systems and methods to convert images into high-quality compressed documents |
US7734089B2 (en) * | 2005-08-23 | 2010-06-08 | Trident Microsystems (Far East) Ltd. | Method for reducing mosquito noise |
JP4238902B2 (ja) * | 2006-09-04 | 2009-03-18 | 日本電気株式会社 | 文字ノイズ除去装置、文字ノイズ除去方法、文字ノイズ除去プログラム |
US20080174797A1 (en) * | 2007-01-18 | 2008-07-24 | Samsung Electronics Co., Ltd. | Image forming device and method thereof |
US8134762B2 (en) * | 2007-01-29 | 2012-03-13 | Sharp Laboratories Of America, Inc. | Methods and systems for characterizing regions of substantially-uniform color in a digital image |
US7894689B2 (en) * | 2007-05-31 | 2011-02-22 | Seiko Epson Corporation | Image stitching |
US7873215B2 (en) * | 2007-06-27 | 2011-01-18 | Seiko Epson Corporation | Precise identification of text pixels from scanned document images |
JP5349790B2 (ja) * | 2007-11-16 | 2013-11-20 | キヤノン株式会社 | 画像処理装置、画像処理方法、及びプログラム |
CN101577832B (zh) * | 2008-05-06 | 2012-03-21 | 联咏科技股份有限公司 | 用于加强文字显示效果的图像处理电路及其方法 |
US9177218B2 (en) * | 2008-09-08 | 2015-11-03 | Kofax, Inc. | System and method, and computer program product for detecting an edge in scan data |
KR101296681B1 (ko) * | 2008-09-24 | 2013-08-16 | 삼성전자주식회사 | 영상 처리 방법 및 이를 이용한 화상형성장치 |
US9576272B2 (en) | 2009-02-10 | 2017-02-21 | Kofax, Inc. | Systems, methods and computer program products for determining document validity |
US8958605B2 (en) | 2009-02-10 | 2015-02-17 | Kofax, Inc. | Systems, methods and computer program products for determining document validity |
US9767354B2 (en) | 2009-02-10 | 2017-09-19 | Kofax, Inc. | Global geographic information retrieval, validation, and normalization |
US9349046B2 (en) | 2009-02-10 | 2016-05-24 | Kofax, Inc. | Smart optical input/output (I/O) extension for context-dependent workflows |
US8774516B2 (en) | 2009-02-10 | 2014-07-08 | Kofax, Inc. | Systems, methods and computer program products for determining document validity |
CN102318330B (zh) * | 2009-02-13 | 2014-07-23 | 奥西-技术有限公司 | 用于处理数字图像的图像处理系统和处理数字图像的图像处理方法 |
US20120087596A1 (en) * | 2010-10-06 | 2012-04-12 | Kamat Pawankumar Jagannath | Methods and systems for pipelined image processing |
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US20120128244A1 (en) * | 2010-11-19 | 2012-05-24 | Raka Singh | Divide-and-conquer filter for low-light noise reduction |
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US9058515B1 (en) | 2012-01-12 | 2015-06-16 | Kofax, Inc. | Systems and methods for identification document processing and business workflow integration |
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US9165188B2 (en) | 2012-01-12 | 2015-10-20 | Kofax, Inc. | Systems and methods for mobile image capture and processing |
US9483794B2 (en) | 2012-01-12 | 2016-11-01 | Kofax, Inc. | Systems and methods for identification document processing and business workflow integration |
US10146795B2 (en) | 2012-01-12 | 2018-12-04 | Kofax, Inc. | Systems and methods for mobile image capture and processing |
US9355312B2 (en) | 2013-03-13 | 2016-05-31 | Kofax, Inc. | Systems and methods for classifying objects in digital images captured using mobile devices |
US9208536B2 (en) | 2013-09-27 | 2015-12-08 | Kofax, Inc. | Systems and methods for three dimensional geometric reconstruction of captured image data |
CN105283884A (zh) | 2013-03-13 | 2016-01-27 | 柯法克斯公司 | 对移动设备捕获的数字图像中的对象进行分类 |
US20140316841A1 (en) | 2013-04-23 | 2014-10-23 | Kofax, Inc. | Location-based workflows and services |
US9134931B2 (en) | 2013-04-30 | 2015-09-15 | Hewlett-Packard Development Company, L.P. | Printing content over a network |
CN105518704A (zh) | 2013-05-03 | 2016-04-20 | 柯法克斯公司 | 检测和分类使用移动设备采集的视频中对象的系统和方法 |
WO2015073920A1 (fr) | 2013-11-15 | 2015-05-21 | Kofax, Inc. | Systèmes et procédés de génération d'images composites de longs documents en utilisant des données vidéo mobiles |
JP6338469B2 (ja) * | 2014-06-23 | 2018-06-06 | キヤノン株式会社 | 画像処理装置および画像処理方法 |
CN105335953B (zh) * | 2014-07-07 | 2018-04-10 | 富士通株式会社 | 提取图像的背景亮度图的装置和方法、去阴影装置和方法 |
US9760788B2 (en) | 2014-10-30 | 2017-09-12 | Kofax, Inc. | Mobile document detection and orientation based on reference object characteristics |
US10242285B2 (en) | 2015-07-20 | 2019-03-26 | Kofax, Inc. | Iterative recognition-guided thresholding and data extraction |
US9779296B1 (en) | 2016-04-01 | 2017-10-03 | Kofax, Inc. | Content-based detection and three dimensional geometric reconstruction of objects in image and video data |
CN106057167B (zh) * | 2016-07-21 | 2019-04-05 | 京东方科技集团股份有限公司 | 一种对文字边缘暗化处理的方法及装置 |
US11062176B2 (en) | 2017-11-30 | 2021-07-13 | Kofax, Inc. | Object detection and image cropping using a multi-detector approach |
JP7282510B2 (ja) * | 2018-12-07 | 2023-05-29 | キヤノン株式会社 | 画像処理装置、画像処理方法、およびプログラム |
Citations (4)
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EP0188193A2 (fr) * | 1985-01-15 | 1986-07-23 | International Business Machines Corporation | Procédé et appareil pour le traitement de données d'image |
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-
2000
- 2000-11-01 US US09/704,358 patent/US6621595B1/en not_active Expired - Lifetime
-
2001
- 2001-10-31 JP JP2002540441A patent/JP4112362B2/ja not_active Expired - Fee Related
- 2001-10-31 WO PCT/US2001/045426 patent/WO2002037832A2/fr active Application Filing
- 2001-10-31 DE DE60137704T patent/DE60137704D1/de not_active Expired - Lifetime
- 2001-10-31 AU AU2002227115A patent/AU2002227115A1/en not_active Abandoned
- 2001-10-31 EP EP01993115A patent/EP1330917B1/fr not_active Expired - Lifetime
Patent Citations (4)
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EP0188193A2 (fr) * | 1985-01-15 | 1986-07-23 | International Business Machines Corporation | Procédé et appareil pour le traitement de données d'image |
US5850298A (en) * | 1994-03-22 | 1998-12-15 | Ricoh Company, Ltd. | Image processing device eliminating background noise |
US5699454A (en) * | 1994-05-09 | 1997-12-16 | Sharp Kabushiki Kaisha | Image processing apparatus |
US5848181A (en) * | 1995-07-26 | 1998-12-08 | Sony Corporation | Image processing method, image processing apparatus, noise removing method, and noise removing apparatus |
Also Published As
Publication number | Publication date |
---|---|
JP2004521529A (ja) | 2004-07-15 |
EP1330917B1 (fr) | 2009-02-18 |
AU2002227115A1 (en) | 2002-05-15 |
WO2002037832A2 (fr) | 2002-05-10 |
US6621595B1 (en) | 2003-09-16 |
JP4112362B2 (ja) | 2008-07-02 |
EP1330917A2 (fr) | 2003-07-30 |
DE60137704D1 (de) | 2009-04-02 |
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